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Aviation History
1918
1918 - 0207.PDF
FEBRUARY 21, 1918. INTERNATIONAL AIRCRAFT STANDARDS. (C*ntinu*d from page 184.) 4P1.—Specifications for Turnbuckles. •: GENERAL.—1. The general specifications, 1G1, shall form, according to their applicability, a part of these specifications. MATERIAL.—2. Barrels shall be made of naval brass or equivalent alloy, I.A.S.B. specifications 3N4. The shank shall be made of steel, I.A.S.B. specifications 3S4. ; PHYSICAL PROPERTIES AND TESTS.—3. (a) At least 2 per cent, of all turnbuckles shall be subjected to the test load given in the table and must withstand this test. Steel turn buckle shanks shall be heat treated to withstand the test loads specified. (6) A bent test shall be made upon a (unbroken) shank of each turnbuckle tested in tension ; the shank must with- stand bending through 90 deg. without cracking. DIMENSIONS AND TOLERANCES. — 4. Dimensions and tolerances are given in the tables following. ASSEMBLY.—5. The threads are to be greased and have a snug true fit allowing the barrel or shank to be turned by hand and showing absolutely no slackness in fit or per- ceptible end shake when the ends have been extended three threads from the barrel. FINISH. — 6. Turnbuckle shanks shall be thoroughly covered with a suitable non-corrosive grease before shipment. Before inspection of the finished turnbuckles they may, if so specified, be copper plated in order that initial stress in the barrel may be detected. After this inspection turnbuckles shall be greased or shall be coated with an air-drying enamel as specified. 3S15.—Specifications for 7 x 19 Extra-Flexible Steel-Win Cable. GENERAL.—1. (a) This specification covers the finish, material and construction of high-strength steel wire cable composed of tinned-coated steel wires twisted concentrically around a tinned-steel wire centre, thus forming a strand and. DIMENSIONS IN INCHES^ I A 1 B 1 C 1 D 2 A 2B 2C 1$,3S • c 4D 5 A 5B ?S 6 A6B 6C6D ti c/) ',500 1,500 i,5oo 1,500 2,150 2,150 2,150 2,1 jo 3,000 3,000 3,ooo 3,000 4,000 4,000 4,000 4,000 5,750 5,750 5,750 5,750 8,400 8,400 8,400 8,400 E o o+ 1 0.130 .130 .130 .130 .157 • 157 .157 .157 .185 .185 .185 .185 .213 .213 .213 .213 in mo o o o o o Eye end. A '.B « o mm"• O ' O K !R in m in inOO OO OO 00 Oo °O + + W 00 00 __ 00 00 00 00 00 o 00+1 +1 +1 +1 +1 +1 +1 +1 0.203 0.500 0.500 0.219 0.250 0.188 0.219 0.281 0.500 .203 I.531 .500 .219 .250 .188 .219 .281 .500 .203 .500 .500 .219 .250 .188 .219 .281 .500 .203 I.531 .500 .219 .250 .188 .219 .281 .500 .318 8 3 .318 .2O3 .500 .2O3 1.531 ,203 .500 .203 I.531 .234 .500 .234 1.375 .234 .500 .234 1.375 .265 .500 .265 1.250 .265 .500 .265 1.250 .563 .219 .328 •563 -219 -328 •563 .219 .328 .563 .2ig .328 .625 .281 .391 .625 .281 ,391 .625 .281 .391 .625 .281 .391 .688 .344 .422 .688 .344 .422 .688 .344 .423 .688 .344 .422 .188 .188 .188 .18S .219 .219 .219 .219 .219 .250 .219 .250 .219 .250 .219 .250 .250 .281 .250 .281 .250 .281 .250 .281 .313 .500 .313 .500 .313 .500 .313 .500 •375 -625 .406 .625 •375 -625 .406 .625 .500 .688 .500 .688 .500 .668 .500 .6J8 .256 .313 .500 .750 .313 .469 .281 .313 .563 .750 .256 .313 1.250 .750 .313 .469 .281 .313 .563 .750 .256 .313 .500 .750 .313 .469 .281 .313 .563 .750 .256 .313 1.250 .750 .313 .469 .281 .313 .563 .750 .375 -5oo -375 1-125 -375 .500 .375 1.125 .875 .313 .875 .313 .875 6.313 .875 .313 .500 .500 .500 .500 .328 .328 .328 .328 .375 .375 .375 .375 .625 .625 .625 -625 .875 .875 .875 .875 B mmo o o o D « O m o 38 Fork'end. G H in o <n m P m m sm m T m m OO OO OO *O OO OO OO OO + 1 +1 +1 +1 +1 +1 +1 +1 0.275 0.156 0.313 0.110 0.300 0.219 0.500 0.560 .275 .156 .313 .110 .300 .219 .500 .560 .328 .328 a.328 •391.391 a.391 .422 .422 • 469 .469 .500 .500 .188 .188 a.188 .250 .250 a. 250 .250 .250 .281 .281 • 313 • 313 • 313 .313 •344 •344 •438 .438 .563 .563 •563 .563 .no .110 .110 .110 .203 .203 .203 .203 .266 .266 .438 .500 .625 .625 .625 .625 .625 .625 .563 .563 .219 .219 .250 .250 .281 .281 •313 •313 •375 • 375 .500 .500 .625 .625 .688 .688 • 750 • 750 •875 .875 .625 .687 •813.813 •875 •875 .875 •875 .875 .875 Barrel. L M N mm in a When a turnbuckle has two eye ends with different size holes for the pin and cable, the two diameters are given. b This turnbuckle is to be bored to receive pin on one end only. 00 00 00+ I +1 +1 •375 O.281 0.208 •375 .281 .208 •375 .281 .208 .375 .281 .208 .375 .328 .375 .328 .375 .328 •375 328 •453 -391 •453 -391 •453 -391 •453 -391 .500 .438 •500 .438 .500 .438 .500 .438 •53' -484 •531 .484 531 -484 531 484 .281 .281 .281 .281 •313 • 3'3 •313 •313 •375• 375 • 375• 375 .438.438 .438• 438 •625 .594 .469 •625 .594 .469 .625 .594 .469 •625 .594 .469 DIMENSIONS IN MILLIMETRES. & i A 1 B 1 C 1 D 2 A 2B 2C 2D 3A |S 3D 4A4B 4C4D 6A6B 6C6D Str ki l 680.4 680.4 680.4 680.4 975-2 975-2 975-2 975-2 1,361 ',361 I,36l 1,361 1,814 1,814 1,814 1,814 5 A 2,608 5 B 2,608 5 C 2,608 5 D 2,608 3,810 3,810 3.810 3,810 X CO CO o + I Eye end. A B mo fOfO o + I 3-3O3-3° 3-30 3-30 3-99 3-99 3-99 3-99 4.70 4.70 4.7O 4.70 5-41 5.41 5-41 5-41 6.50 7-94 12-70 19-05 6.50 7.94 31.75 19.05 6.50 7.94 12.70 10.05 6.50 7-94 31-75 19-05 K R W o + I I5.16 12.70 12.70 5.16 38.89 12.70 5.16 12.70 12.70 5.16 38.89 12.70 5.16 12.70 14-29 5.16 3S.89 14.29 5.16 12.70 14.29 5.16 38.89 14.29 5.95 12.70 15.88 5-95 34-93 15-88 5.95 12.70 15-88 5-95 34-93 15-88 6.73 12.70 17.46 6.73 31-75 I7-46 6.73 12.70 17-46 6.73 31-75 17-46 5.56 6.35 5-56 6.35 5-5° 6-35 5.56 6.35 5-56 8.33 5.56 8.33 5.56 8.33 5.56 8.33 CO m fO CO CO CO CO CO MO MM MM MM o o 00 +I +1 +1 +1 4.76 5-56 7-14 12.70 4-76 5-56 7.14 I2-7O 4-76 5-5* 7-14 «-70 4.76 5.56 7.H 12.70 4.76 5.56 7-94 12.70 4.76 5.56 7-94 12.70 4.76 5-56 7-94 12.70 4-76 5-56 7-94 12.70 7.14 9-92 5.56 6.35 9.53 15.88 7.14 9.92 5.56 6.35 10.32 15.88 7.14 9-92 5.56 6.35 9-53 15.8S 7.14 9.92 5.56 6.35 10.32 15.88 8.73 10.72 6.35 7.14 12.70 17.46 8.7310.72 6.35 7.14 12.70 17.46 8.73 10.72 6.35 7.14 12.70 17.46 8.73 10.72 6.33 7.14 12.70 17.46 7.94 II.91 7.94 11-91 7.94 «.oi 7-94 "-9I 7-14 7.14 7.14 7.14 7-94 14-29 19-05 7.94 14-29 19-05 7-94 1429 1905 7.94 14-29 19-05 8.08 9.53 12.70 22.23 7-94 12.70 8.33 9.53 15.88 22.23 8.08 9.53 28.58 22.23 7-9412,70 8.33 9.5315.8822.23 8.08 9.53 12.70 22.23 67-94 12-70 8.33 9.53 15.88 22.23 8.08 9.53 28.58 22.23 7.94 12.70 8.33 9.53 15.88 22.23 B CO CO O + 1 6.99 6.99 8.33 8.33 «8-33 9.92 9.92 ag.92 10.72 10.72 11.91 11.91 12.70 12.70 D m 00 0 O + 1 3-97 397 4-76 4.76 84.76 6.35 6.35 "6.35 6 35 6.35 7.14 7.14 7.94 7-94 occ c-r 7 F 0 10 1 .94 7-94 7 • 94 7-94 8 8 II it 14 14 14 • 73 -73 II 11 29 29 29 29 ?ork end. G 00 0 CO O c -T 2 2 2 2 2 2 •> 5 5 5 6 6 1 .79 •79 •70 •79 -79 • 79 .16 16 16 16 75 75 H CO CO 0 + 17-62 7 11 12 15 15 15 15 15 15 14. .62 .11 .70 .88 .88 88 88 88 88 29 29 P CO CO M M 0 + 5 5 5 5 6 6 7 7 7 7 9 9 1 • 56 • 56 •56 • 56 • 35 •35 14 14 94 94 53 53 S CO CO O + 12 12 12 12 15 15 1 • 70 .70 •70 .70 .88 .88 17.46 17 19 19 22 22 46 05 05 23 23 T CO CO O 14 14 15 17 20 20 22 22 22 22 22. 22. 1 .22 .22 .88 •46 64 04 23 23 23 23 23 23 Barrel. M CO CO c1 +1 9 9 9 9 9 9 • 53 .53 • 53 •53 •53 •53 9-53 9 11 11 11 II 12 12 12 12 13 13 13 13 15 15- 53 • 51 51 51 51 70 70 7O 70 49 49 49 49 88 8815.88 15 88 fO CO 0 + 1 7.14 7.14 7.14 714 8.33 8.33 8.33 8.33 9.92 9.92 9.92 9.92 II.II II.II II.II II.II 12.30 12.30 12.30 12.30 15.08 15.0815.08 15.08 5 5 5 5 7 77 7 7 7 7 7 9 9 9 9 11 11 11 11 11 11. 11. 11 CO CO 0 4•4 •4.2° .14 .14 .14 .14 •94 •94 .94 •94 53 53 53 53 n 11 11 11 91 91 91 91 •3"I03' 30 3O 3O 3O 30 30 30 30 28 28 28 38 26 36 26 26 34 24 *4 24 33 33 . 33 3a a When a turnbuckle has two eye ends with different size holes for the pin and cable, the two diameters are given. 6 This turnbuckle is to be bored to receive pin on one end only. NOTE.—In column marked " I.A.S.B. No." the letters used are for the following items: A, short fork and eye turnbuckle; B, long fork and eya tHrnbnckle; C, short double-eye turnbuckle; D long double-eye turnbuckle. 203
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